Siemens MP315 Miniature Circuit Breaker
- 15A
- 3 Pole
- Plug-On
Quantity
Siemens MP315 - 15A 3 Pole Miniature Circuit Breaker
New
Quantity
Description
Manufactured under the Murray brand, the MP315 is a 15A, three-pole miniature circuit breaker for 240V applications. It delivers reliable thermal-magnetic protection for residential and commercial systems. This plug-on breaker fits Murray and compatible Siemens load centers. With the Murray MP series phased out, this unit is officially replaced by the Siemens Q315 for future upgrades. Featuring a 10kAIC rating, it includes common trip functionality and is HACR rated for HVAC equipment.Specifications
| Brand | Siemens |
|---|---|
| Part Number | MP315 |
| Series | MP |
| Amperage | 15A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Murray Load Centers, Siemens Load Centers |
| Wire Gauge | 14-6 AWG (Cu), 12-6 AWG (Al) |
| Max Wire | 6 AWG |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Standards | HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip, HACR Rated |
Product FAQs
7 answersWhat is the direct replacement for the Murray MP315?
Siemens phased out the Murray brand and the MP series. The officially UL-listed direct replacement for the MP315 is the Siemens Q315, which is a Type QP breaker.
Are Siemens and Murray MP315 breakers the exact same product?
Yes. Siemens acquired Murray and produced the MP series under both brand names. An MP315 breaker is physically and electrically identical whether it carries a Siemens or Murray label.
Can I install the MP315 in a Siemens load center?
Yes, this plug-on breaker is cross-listed for use in both Murray and compatible Siemens load centers that accept 1-inch per pole Type MP or Type QP breakers.
What wire gauges are compatible with the MP315 lugs?
The load side terminals accept 14 to 6 AWG copper wire or 12 to 6 AWG aluminum wire. Always verify the specific torque requirements printed on the breaker before terminating the conductors.
Is the MP315 suitable for HVAC applications?
Yes, this breaker is HACR rated, making it approved for use with heating, air conditioning, and refrigeration equipment that requires a 15A, 3-pole circuit breaker.
What does the LI trip function mean on the MP315?
The LI designation indicates a standard thermal-magnetic trip unit. It provides Long-Time thermal protection against sustained overloads and Instantaneous magnetic protection against short circuits.
What applications typically require a 3-pole 15A breaker?
A 3-pole 15A breaker is generally used in 3-phase commercial or light industrial applications to protect small 3-phase motors, machinery, or equipment operating on a 240V AC system.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 4 reviews.
- JVJulie V.Verified BuyerReviewingSiemens / Murray MP2100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars3/5/26on breaker
so far so good on the refurbished breaker
- JFJon F.ReviewingSiemens / Murray MP250 - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars12/17/20Sales
Fantastic group to work with...
- DSDavid S.ReviewingSiemens / Murray MP2100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars1/5/20Thank you so much for
Thank you so much for sending me a 100 amp breaker that was in the condition that you said it would be in.With out your breaker I would still be in the dark Thank you David
- RARichard A.ReviewingSiemens / Murray MP2100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/13/19Awesome!
Your prices and number of available items to choose from is Awesome!